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If f(x)=int(-2)^(x)(t^(4)-bt^(3)+(b+1)t^...

If `f(x)=int_(-2)^(x)(t^(4)-bt^(3)+(b+1)t^(2)-bt+b)dt` strictly increases `AAxepsilonR` then no. of integers in range of `b` is

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The correct Answer is:
3
`[3]`
`implies (x^(2)+1)(x^(2)-bx+1)gt0`
So `b^(2)-4lt0impliesbepsilon(-2,2)`
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